Width maintaining means for sheet glass apparatus



Jan. 19, 1932. Q MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS Filed Oct. 30, 1926 3Sheets-Sheet l gwuento'a Luke 6. Mamba w;

Jm. 19, 1932. L. c. MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS Filed Oct. 50, 1926 aSheets-Sheet 2 R 3o 5 ,9 i Z 54 54 IBE gwuemioz Luke C. Mamba/lg atbozmgJan. 19, 1932. L. c. MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS p 1926 5Sheets-Sheet 5Ratented Jan. 19, 1932 tam:

MES

- ent-ea ATENT orFic- Y LUKE; c. MAMBonRe, or Lanoesran, on o', ssrenozaT0 nnzrnyownnsfronn en res s COMPANY, or ronnno, 0310, A CORPORATION oronto WIDTH MAINTAINING eans son SHEET e ss arrena'rns amalgam. filedGctober 30,1926. Serial no. 145,210.

V The present invention re'latesto sheet glass apparatus, and has moreparticular reference to ,improvedsmeans for preventing the narrowing ofa sheet being drawn. from a mass of molten glass. i

An important object of the invention is to provide improved means atboth edges of the sheetbeing .drawn for creating an edge relatjively vscous and suiiiclently strong to prevent narrowing of the sheet. Y

Another nnportantobpct of the invent on is to provide improved widthmaintaining means of the above character, whereby the thickness of theedges formed on the sheet may be varied as desired andefl'ect1vely,con.-'

" able. member so constructed as to permit the continuous circulation ofa cooling medium therethrough.

A still further object of the invention is to provide improved widthmaintaining means of the above charactenincluding a yoke having a slotfor receiving the edge portion of the sheet, and means for increasing ordecreasing the width of said slot to'vary the thickness ofthe edge beingformed on said sheet.

Still another and important object of the invention to provide improvedwidth main tainingineans of the above character, including a yokearranged about .each edge of the sheet and provided with spacedyieldable jaws engaging said sheet, means for supporting said yoke, andmeans for contracting and expanding. saidv jaws whereby .to vary thethickness of the edge being formed on said sheet. 1 r r I Stillfanotherobject of the invention isthe provision ofmeans for adjustably mountingt1 phoned width maintaining means. Gtherob ects and advantages oftheinventron will become moreapparent .duringthe Inthedrawings formingapart-of this plication and wherein like numerals are em 7 devices insection,

ployed to designate like parts throughout the same,

I Fig. 1 is atransverse sectional View of sheet glass drawingapparatusshowing associated therewith improved Width maintaining meansconstructed in accordance with the present invention, 1

. Fig. ,2 is a detail section taken on line 22 of Fig. 1, V

Fig. 3 is a fragmentary view of a portion of the sheet glass drawingapparatus showmg one .of the improved width maintaining Fig. 4 is aninner edge elevation. of one the improved'width maintaining devices.

Fig. 5 is afragmentary sectionof another type of sheet glass drawingapparatus in connection with whichthe present inventionmay be used, v II F 1g. 6 is a View somewhat similar to Fig. 1

but showing the width maintaining device in tilted position,

7 is a detail top plan view of the means for adjustably supporting thewidth main' taining device,

F ig. 8 is a top plan'view of a slightlymodilied 1 0111101? the presentinvention, and

Fig!) is a transverse sectional View taken substantially on line 9.9 ofFig. 8. j

In drawing sheet glass in accordance with the Colburn Patent No.1,248,809, granted December 4,1917, a draw pot 10, containing a massofinolten glass 11, is provided, and a sheet 12 is drawn from the saidmass initially in thevertical plane fora-short distanoe after which itis deflected over a bending member '13 into the horizontal lane.

The glass isthen run over a flattening table v V and through anannealing leer which have, not been shown.

In accordance with the Colburn machine, a pair of rotatable knurledrollers areprovided at both edges and on'either side ofthe sheet to forman edge thereon suficiently viscous to prevent narrowing of the sheet.

to. an appreciable extent. It is an of the present invention tosubstitute for these knurled ro11ers ,a slotted yieldable-member or yoketo obviatethe necessity for the lriv.- ngme h ni m nd t a so utlow theamount of waste that has heretofore been had.

In accordance with the present invention, there is provided at each edgo of the sheet 12 adjacent the source 11, a stationary supportingmember or yoke 1 1, comprising side portions 15 and 16 and a connectingbight por tion 17. he yoke let is supported upon a bar or the like 18carried by suitable supporting structure 19, which will he morespecifically hereinafter described.

Arranged within the stationary yoke 14, is a second yoke or slottedmember designated in its entirety by the numeral 20 and comprisingspaced yieldable jaws 21 and 22 and a connecting bight portion 23. Thespaced jaws 21 and form slot 35 for receiving the edge portion 12 of thesheet 12.

Carried by the upper and lower ends of the inner yoke 20 are therearwardly extend ing horizontal ears 24- and 25, pivotally secured tothe stationary yoke 14 and supporting bar 18 respectively, by means ofpins 26 and 27. With such a construction as described, it will be seenthat the inner yoke or slotted member 20 will be permitted to swinglaterally relative to the supporting yoke 14:.

The slotted member 20 is preferably hollow to permit the continuouscirculation of a suitable cooling medium therethrough, and this mediumis introduced into the member through a supply pipe 28 adjacent thelower end thereof. The cooling medium, after it becomes heated, willnormally rise within the member 20 and pass outwardly through the pipe29.

One of the important features of the present invention, is the provisionof means whereby the thickness of the edge being formed on the sheet maybe varied as desired and effectively controlled. This is accom plishedby providing means for contracting and expanding the jaws 21 and 22 ofthe member 20 whereby to increase or decrease the width of the slot 35.

In order to expand the jaws 21 and 22, there is carried by each of thesides 15 and 16 of the yoke 14, apair of vertically spaced adjustingscrews 30 and 31. These adjusting screws pass loosely through the saidsides 15 and 16 of the stationary yoke and are threadedly receivedwithin bosses 32 formed on the jaws 21 and 22. Thus, in order toincrease the width of the slot 35 it is simply necessary to thread theadjusting screwsSO and 31 into the bosses 32, and wnen this is done thesaid jaws will be caused to move outwardly. This increasing of thedistance between the said jaws will tend to necessa-' rily increase thethickness of the edge being formed on the sheet.

In order to contract the yieldable aws 21 and 22 and thus reduce thewidth of the slot 35, there are'provided adjusting screws 33 and 34;arranged at each side of the yoke 1-1 and between the adjusting screws30 and 31. The adjusting screws 33 and 34 are threaded through the sides15 and 16 of the said stationary yoke and simply bear against theyieldable jaws 21 and 22. T 0 move the yieldable jaws closer together,it is only necessary to first loosen the screws 30 and 31 andsubsequently thread the screws 33 and 3st inwardly. These screws bearingagainst the yieldable jaws will tend to force them closer together,thereby reducing the width of the slot 35 andthe thickness of the edgebeing formed on the sheet.

The operation of the machine with these width maintaining devices willbe slightly different than with the knurled rollers described above. Theedge of the glass sheet being drawn up will be pulled through the slot35 and because of the inherent tendency of molten glass, a certainamount of frictional resistance will be had between the moving glass andthe jaws 21 and 22 of the mem-- ber 20. This frictional retardationencoura lowering of the temperature of the glass which is furtheraccelerated by means of the cooling medium. The cooling is not so severethat the glass becomes set, but it is of such a nature that the edge ofthe glass will be comparatively viscous to the main body of the glass,thus being sufllciently strong to prevent the glass sheet from narrowingat its base. hile the present invention has been described hereinabovein connection with one particular type of process, yet it is to beunderstood that its use is not to be restricted to any one specific formof sheet glass apparatus, inasmuch it may be used just as satisfactorilyin other types of processes.

For instance, in Fig. 5 has been dis-closed a portion'of the so-calledFourcanlt A rocess for drawing sheet glass and wherein the glass ismelted in an ordinary hearth 36. This hearth communicates by an opening3'! with a small reservoir 38. which receives and constantly beingreplenished with molten glass 39 from the furnace. A damper 10 ofrefractory material is provided for regulating and closing an opening4:1 to allow more or less heat to pass from the hearth to the reservoir38.

A block or deputer 12 of refractory material is arranged in the upperpart of said. reservoir 38 and is provided with a vertical lot 43through which the glass is forced upwardly under hydrostatic pressure. v

The sheet 4:45 is then drawn upwardly and passes between verticallyspaced pairs of rolls 45, through an annealing apparatus 16 having theshape of a vertical casing. The sheet, after becoming set, is then cuttransversely into sheet form will be appreciated.

In this form of the invention, the improved width maintaining devicesare positioned be- 48 and L9.

Lean-e60 tween the annealing apparatus 46' and block 42. 6f courseitwillbe understood that the block or deputer, 42 may be eliminated itdesired.

The supporting structure 19 may be of any suitable construction, but ispreferably of such a type thatithewidthmaintaining devices may bereadily adjusted "relative to sheet 12. iisshown,the'supp'orting bar 18is'securedat its outer end to a substantially rectangular plate 47slidable within aguideway formed by the spaced guide blocks 48 and 49.The side edges of the plate at? are bevelled as at 50 to snugly fitcorresponding 1y undercut bevelled edges of the guide blocks lVith sucha construction, the width maintaining devices can be readily movedcloser toor away from the sheet 12 as preferred and can be secured inthe desired position by means of'set screws 51 which pass through theguideblocl: i8 and bind against the'plate li; I Y r llheguide blocks a8and 49- are pivot-ally mounted asat 52 to a bearing member 53 pro- Videdwith a depending screw-threaded rod 54"which is received within thecentral bear- :ingjportion55 formed on the plate 56. The

plate 56j'rests upon the upper surface of a ,channlironb? and thedepending bearing portion 55 thereor' operates within a longitudinallyextending slot i orined therein. The plate 56 is secured againstaccidental movement by nea'nsof bolts 58 "which pass through and alsooperate in slots formed in the channel iron 57, said bolts carrying attheir lower ends'a secondplate 59which abuts the bott m of the channeliron. A nut 60- is threaded on 'thegrod 54 and rests upon the plate-56sothat'the width maintaining device can be readily raised and loweredrelative to the massot' molten glass 11, by sim'ply'ro tating the nut 60in the desired direction.

Carried by the beari'ng member 53 are outwardly and oppositely directedlugs 61 through which are threaded vertical adj usting screws 62 whichcontact with the bottom of the guide block 49. Thus, when it is desiredto adjust the angle of the width maintaining device relative to thesheet, 12, it is only necessary to first loosen one of the adjustingscrews 62 and subsequently tighten up on the opposite screw whereuponthe guide blocks 48 and 49mm be rocked about their pivots 52whereby tochange the angle of the width maintaining device. In Fig. 6, the widthmaintaining device has been shown at an angle relative to the sheet, andby tilting the. devices in this manner, they will serve to grip anddirect the edges of the sheet upwardly and outwardly, thereby stretchingthe sheet transversely whereby to permit a relatively wider sheet to bedrawn from a given width oi draw pot. T i

In order to move the width maintaining devices horizontally andlongitudinally of thedraw ipotythe bolts 58*can be loosened and theplate 56 slid along on the channel'iron '57. v With such supportingstructure, as

described hereinabove, the width'maintaining devices can bemoved towardsandaway from the sheet, raised or lowered relative to thedraw pot, movedhorizontally and longitudinally ot'thedraw pot, and tilted upwardly ordownwardly in the glass.

' in Figs. 8 and 9, wherein has been showna slightly modified form ofthe present inventio'ngit will be'noted that the slot 35 in the,yoke'ormember 20, is widerat its lower end throughout its entire width;It isbelieved 4 thatwitlr'such a construction,the width of the sheet"can be materially increased.

'It is'to be understood that the formof-the invention herewith shown anddescribed is to be taken as the preferred embodiment'of the' same, andthat various changes {in the shape,-size and arrangement'ot parts may beresorted to \vithou-tdeparting trom'the spirit of the invention orthe'scope of the subjoined claims. r I

Claims: i p i 1; In sheet glass apparatus, the combination with meansfor'dra'win'g 'asheet from a bath of molten glasaot means for maintaining saidsheet to width, including a slotted member having resilientportions embracing the sheet edge.

In sheet glassapparatus, the combination with-means for drawing a sheetfroma bath of molten glass, of means for maintain ing gsaid sheet towidth, including a slotted member embracing the sheet'edge, and meansfor-deforming said'member to vary the width ofthe slot therein. v

V 1n sheet glass apparatus, the combination with means for drawing asheet from a bath otmolten glass, 01 means for maintaining said sheet towidth, including a slotted member having 'i'a' pair of spaced jawsembracing thesheet edge, and means for deforming said member to vary thedistance be tween said jaws, V V

4. In sheet glass apparatuathe co nbi'nae tion with means for drawing asheet from a bath "of molten glass, of means for maintaining sa'idshetto rwidth including a slotted 7 member having a pairof spacedjaws'embracing the sheetedg'e, means for deforming said member-tovarythe. distance between said jaws, and means for internally coolingthe jaws.

5. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a slotted member having resilient portions embracingthe sheet edge, and means for effecting contraction and expansion ofsaid resilient portions to vary the width of the slot in said member.

6. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a substantially U-shaped member having a pair ofspaced resilient jaws embracing the sheet edge, and means for effectingcontraction and expansion of said jaws to vary the distancetherebetween.

'7. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a substantially U-shaped member having a pair ofspaced resilient jaws embracing the sheet edge, means for effectingcontraction and expansion of said jaws to vary the distancetherebetween, and means for internally cooling said jaws.

8. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a yoke, and a deformable member arranged within andcarried by said yoke and having portions thereof embracing the sheetedge.

9. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a yoke having spaced rigid side portions, a slottedmember arranged within and carried by said yoke and having a pair ofspaced aws embracing the sheet edge, and means carried by the sideportions of the yoke and engaging the jaws for deforming said slottedmember to vary the width of the slot therein.

10. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a yoke having spaced rigid side portions, a slottedmem- 38! arranged within and carried by said yoke and having a pair ofspaced jaws embracing the sheet edge, means carried by the side portionsof the yoke and engaging the jaws for deforming said slotted member tovary the width of the slot therein, and means for internally coolin saidslotted member. 7

11. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a yoke having spaced rigid side portions, a slottedmember arranged within and carried by the yoke and having resilientportions embracing the sheet edge, and means carried by the sideportions of said yoke and engaging said resilient portions for effectingcontraction and expansion thereof to vary the width of the slot in saidslotted member.

12. In sheet glass apparatus, the combina tion with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a fixed substantially U-shaped member having spacedrigid side portions, a substantially U-shaped member arranged within thefirst member and having a pair of resilient jaws embracing the sheetedge, and means carried by the side portions of said first member andengaging the jaws of the second member for effecting contraction andexpansion thereof.

13. In sheet glass apparatus, the combination with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a substantially U-shaped member having rigid sideportions, a second substantially U-shaped member arranged within thefirst member and including spaced jaws for receiving the sheet edgetherebetween, and means carried by the side portions of the first memberand engaging the jaws of the second member for moving said jaws towardand away from one another.

14. In sheet glass apparatus, the combina' tion with means for drawing asheet from a bath of molten glass, of means for maintaining said sheetto width, including a slotted member having a pair of jaws embracing thesheet edge, and means for deforming said member to vary the width of theslot between said jaws, said slot tapering from one end to the other.

Signed at Lancaster, in the county of Fairfield and State of Ohio, this27th day of October, 1926.

LUKE C. MAMBOURG.

